Have you ever held up the checkout line at Target because you couldn’t remember which of your credit cards offered a special cash-back boost at megastores?

No? Just me? That can’t be true.

Wallaby looks at where you're shopping and tells you the best card to use.

I have three credit cards, and each has its own set of rewards and rules. One of them changes said rewards every quarter—pretty much just when I’ve memorized what last quarter’s special boost was. I picked these cards based on rewards, and had a sinking feeling that I wasn’t always maximizing what they had to offer. So imagine my reaction to finding Wallaby, a credit card management app for iOS. I was THRILLED.

Wallaby looks at your credit cards and tells you which one is the best to use at any given store, based on the type of rewards your cards offer. That way, you won’t miss out on an extra cash-back boost, miles, or other points—which, in the end, saves you money, too. You don’t even have to link up your credit card accounts if you don’t want to—you can instead just tell the app what kind of Visa, MasterCard, American Express, or Discover, or JCB cards you have. (Wallaby has thousands of credit cards in its database, but if you don’t see yours listed, you can file a request to add yours in.)

Rack up rewards!

Once Wallaby has your card info, all you have to do is launch the app and take a look at Wallaby’s map view. It gives you a list of every business nearby, and suggests the best card for you to use if you want to purchase something at any of these shops. There’s also a tab for online stores, and another that breaks businesses down into categories, showing your best card for hotels, restaurants, department stores, and other business types.

Like I said, all Wallaby needs to know is the type of cards you have, but if you want to link your accounts, it can do even more. (Rest easy: the app uses bank-level security to keep your info safe.) Instead of recommending which card to use based solely on reward type, it will take your balance and spending limit into account and adjust its recommendations accordingly. It also keeps tabs on your spending trends, lets you know when you’re approaching your card limit, and shows you your card reward earnings. In addition, its Wallet Boost feature can recommend other credit cards based on your spending habits and preferences that could be better than the cards you already have.

This is one of those apps that’s helpful during the holiday season (I’m talking to you, Black Friday shoppers), but is also an awesome tool to use year-round. Wallaby isn’t trying to change your spending habits or push coupons on you that you’ll never actually use. It understands that you’ll always have to spend money—be it on groceries, gas, or gifts—and it just wants to help you figure out the best payment method and reward you for it, no matter where you shop.

Leah Yamshon has been a part of the Macworld family since 2011. She started out covering iOS accessories (So. Many. Cases.) and Mac software, then moved on to all things iOS. She now works behind-the-scenes to keep Macworld's calendar full.